Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It does not say whether this is a read-only query, what the history includes (leave types, date ranges, statuses), whether it is scoped to the current user or requires elevated permissions, or how results are ordered. The 'read' nature is only implied by the verb 'Get'.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.